Add diffusion files from Francois

diffusion/greenOperatorConductionNumba.py

diffusion/hierarchicSelfConsistentNumba.py

diffusion/microstructure.py

elasticite/Homog_hierar.py

elasticite/Reference.py

elasticite/courbes.py

elasticite/execute.py

elasticite/inclusions.py

elasticite/inclusions_elliptiques.py

...e/influence_tensors-nu=0.0-patch_size=02-max_depth=10.npy

...e/influence_tensors-nu=0.5-patch_size=02-max_depth=10.npy